| 摘要: |
| 通过采用CFD模拟，并结合实验，考察了以R236fa为工作流体的喷射器性能。研究了喷射器结构对其性能的影响。模拟所需的喷射器几何结构简化为三维中心对称结构，计算选用Shear Stress Transport（SST）模型。经研究表明：在给定工作参数条件下，喷嘴出口端长度D1以及喷射器喷嘴出口与混合段出口之间距离D2均存在一个最佳值，此时喷射系数达到最大；而喷射器性能随其扩散室出口角度α的增加而降低。 |
| 关键词: 喷射器 三维模型 SST模型 R236fa |
| DOI： |
|
|
| 基金项目:国家自然科学基金（51276171）资助项目。 |
|
| CFD Analysis and Experimental Study on the Effect of Geometries for the Performance of an Ejector |
| Xia Zaichao,Li Jianxin,Gao De,Chen Guangming |
| (School of Mechanical Engineering ,Taiyuan University of Science and Technology;Ningbo Institute of technology ,Zhejiang University;Institute of Refrigeration and Cryogenics, Zhejiang University) |
| Abstract: |
| The ejector performance is numerically and experimentally investigated using R236fa as working fluid to analyze the influence of the critical geometries of ejector. The ejector used in the simulation has simplified three-dimensional centrosymmetric structure and the Shear Stress Transport（SST）turbulence model has been used. The results show that when the operating parameters conditions are given, both of the length of nozzle outlet (D1) and the distance of nozzle exit to mixing chamber (D2) have an optimal value. At this point, the entrainment ratio reaches the maximum. While the angles of diffuser (α) increase, the performance of ejector decline. |
| Key words: ejector three-dimensional model SST model R236fa |
